Connect the first port of the device to your wired interface, press the RES button on the device and connect it to power. Wait until you see Dnsmasq assigning an ip to the device, then release the button.

Photos of PCB (circa May 2014). Note that there appear to be testpoints for a serial port connection along with 3.3V power. In addition you can see the spot where USB could be, but the connector and power supply apear to de-populated. The back side was very uninteresting.